Brain as information integration organ links named stimuli, coordinating structures and effectors so body systems or plant tissues produce an integrated biological response.
Coverage 2012–2024 · Updated 16 Jul 2026
The brain is a central integration organ that combines information from several inputs before coordinating responses.
Current sensory inputs can be compared with stored information. Changes in neural connections support learning, while stored and retrievable information supports memory; both influence how later inputs are interpreted and acted on.
Trace input from several receptors → combined processing in the brain → comparison with learned or remembered information → coordinated output. Detailed slow-acting neurotransmitter mechanisms are not required.
A learner sees a traffic signal, hears an approaching vehicle and recalls the crossing rule; the brain combines these inputs and memory before coordinating whether to step forward or wait.
Integration is not simple forwarding of one sensory message. The objective concerns combining inputs plus learning and memory, not memorizing detailed functions of many brain regions.
This objective is assessed through essay response, commonly using Explain / Outline / Identify.
Explain / Outline / Identify / Label / State / Discuss / Determine / Compare / Contrast
Mark schemes reward named structures, correct direction of information flow and explanations that keep the sequence causal.
Naming a brain region without linking it to information integration or coordination.
Representative question
Explain two methods that scientists have used to determine the different functions of the brain.
